python 用 matplotlib 的 matshow() 函数绘制矩阵

matplotlib 的 matshow() 函数用于绘制矩阵

示例1

import matplotlib.pyplot as plt
import numpy as np

mat = np.arange(0, 100).reshape(10, 10)
plt.matshow(mat, cmap=plt.cm.Blues)

plt.show()

 示例2：

import matplotlib.pyplot as plt
import numpy as np

mat = np.arange(0, 100).reshape(10, 10)
plt.matshow(mat, cmap=plt.cm.gray)

plt.show()

 

示例3：

import matplotlib.pyplot as plt
import numpy as np

mat = np.random.rand(10, 10)
plt.matshow(mat, cmap=plt.cm.gray)

plt.show()

示例4：

import matplotlib.pyplot as plt
import numpy as np

mat = np.array([[1,2]])
mat= np.repeat(np.tile(mat, 5), 5, axis=0)

plt.matshow(mat, cmap=plt.cm.Blues)

plt.show()

 示例5：

import matplotlib.pyplot as plt
import numpy as np

mat = np.arange(1, 10).reshape(3, 3)

plt.matshow(mat, cmap=plt.cm.BrBG)
for i in range(mat.shape[0]):
    for j in range(mat.shape[1]):
        plt.text(x=j, y=i, s=mat[i, j])
               
plt.show()